Combustion And Flame Test

Result

Combustion And Flame Test - 6

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Weekly Quiz Competition

Question 1
1 / -0

What should be the state of a substance in order to undergo combustion?

A
Solid or liquid

B
Liquid or gas

C
Solid, liquid, or gas

D
Only liquid

Solution

A combustible substance may be in the solid, liquid, or gaseous state.
Question 2
1 / -0

What happens to the ignition temperature of the burning object when the fire brigade pours water on it?

A
Water lowers the ignition temperature of the burning substance.

B
There is no effect on the ignition temperature of the substance.

C
Water raises the ignition temperature of the burning substance.

D
There is no correlation between the ignition temperature and the effect produced by the pouring of water.

Solution

The ignition temperature of the substance does not change, but water cools the substance below its ignition temperature.
Question 3
1 / -0

Wood cannot burn by just bringing a matchstick near it, because

A
ignition temperature of wood is low.

B
ignition temperature of wood is high.

C
wood is a non combustible substance.

D
wood is an inflammable substance.
Question 4
1 / -0

Which out of the following chemical substances are the components of a matchstick head?
(I) Antimony trisulphide (II) Potassium Chlorate
(III) Red Phosphorus (IV) Powdered glass

A
(III) and (IV)

B
(II) and (III)

C
(I), (II).(III) and (IV)

D
(I) and (IV)
Question 5
1 / -0

Which out of the following options is not an inflammable substance?

A
Petrol

B
Wood

C
Alcohol

D
LPG
Question 6
1 / -0

Which out of the following options is not an essential condition for combustion?

A
Carbon dioxide

B
Fuel

C
Oxygen

D
Heat

Solution

Presence of carbon dioxide is not an essential condition for combustion.
Rather CO₂ is used to extinguish the fire.
Question 7
1 / -0

Water will not work as a fire extinguisher in
I. in an electrical appliances shop
II. in a newspaper factory
III. in a furniture house

A
II and III

B
I and III

C
Only III

D
Only I

Solution

In an electrical appliances shop, the fire would be due to electrical short circuit and if we pour water on to it, it can cause a severe electic shock to the person.
Question 8
1 / -0

In what form carbon dioxide is stored in cylinders?

A
In liquid state at high pressure

B
In gaseous state at low pressure

C
In liquid state at low pressure

D
In gaseous state at high pressure

Solution

In gaseous state at high pressure carbon dioxide is stored in cylinders.
Question 9
1 / -0

Which of the following substances has the maximum calorific value?

A
CNG

B
Biogas

C
LPG

D
Coal

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Re-Attempt Weekly Quiz Competition

Combustion And Flame Test - 6

Result

Combustion And Flame Test - 6

Score

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SHARING IS CARING

Question 1

Solid or liquid

Liquid or gas

Solid, liquid, or gas

Only liquid

Solution

Question 2

Water lowers the ignition temperature of the burning substance.

There is no effect on the ignition temperature of the substance.

Water raises the ignition temperature of the burning substance.

There is no correlation between the ignition temperature and the effect produced by the pouring of water.

Solution

Question 3

ignition temperature of wood is low.

ignition temperature of wood is high.

wood is a non combustible substance.

wood is an inflammable substance.

Question 4

(III) and (IV)

(II) and (III)

(I), (II).(III) and (IV)

(I) and (IV)

Question 5

Petrol

Wood

Alcohol

LPG

Question 6

Carbon dioxide

Fuel

Oxygen

Heat

Solution

Question 7

II and III

I and III

Only III

Only I

Solution

Question 8

In liquid state at high pressure

In gaseous state at low pressure

In liquid state at low pressure

In gaseous state at high pressure

Solution

Question 9

CNG

Biogas

LPG

Coal

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